Port buffering question.

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Hi,

As a newbie I was wondering if it gonna smoke

I'm planning to use a 74LS244 to bridge between a standard paralelle
port and breadboard (use for prototype of LS IC).

Is it safe, I mean will it stop bad stuff from prototype side to go to
pararallel port ics ?

And also what will happen if I disable output of LS244
I mean how will react standard LS TTL to HiZ input ?

:0)

Thanks